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<!--
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Licensed to the Apache Software Foundation (ASF) under one or more
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contributor license agreements. See the NOTICE file distributed with
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this work for additional information regarding copyright ownership.
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The ASF licenses this file to You under the Apache License, Version 2.0
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(the "License"); you may not use this file except in compliance with
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the License. You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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-->
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<html>
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<head>
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<meta http-equiv="Content-Language" content="en-us">
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<link rel="stylesheet" type="text/css" href="../stylesheets/style.css">
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<title>JavaCC Task</title>
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</head>
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<body>
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<h2 id="javacc">JavaCC</h2>
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<h3>Description</h3>
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<p>Invokes the <a href="https://javacc.org/" target="_top">JavaCC</a> compiler compiler on a grammar
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file.</p>
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<p>To use the <code>javacc</code> task, set the <var>target</var> attribute to the name of the
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grammar file to process. You also need to specify the directory containing the JavaCC installation
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using the <var>javacchome</var> attribute, so that Apache Ant can find the JavaCC classes.
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Optionally, you can also set the <var>outputdirectory</var> to write the generated file to a
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specific directory. Otherwise JavaCC writes the generated files to the directory containing the
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grammar file.</p>
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<p>This task only invokes JavaCC if the grammar file is newer than the generated <samp>.java</samp>
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files. JavaCC assumes that the Java class name of the generated parser is the same as the name of
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the grammar file, ignoring the <samp>.jj</samp>. If this is not the case, the <code>javacc</code>
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task will still work, but it will always generate the output files.</p>
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<h3>Parameters</h3>
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<table class="attr">
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<tr>
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<th scope="col">Attribute</th>
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<th scope="col">Description</th>
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<th scope="col">Required</th>
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</tr>
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<tr>
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<td>target</td>
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<td>The grammar file to process.</td>
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<td>Yes</td>
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</tr>
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<tr>
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<td>javacchome</td>
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<td>The directory containing the JavaCC distribution.</td>
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<td>Yes</td>
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</tr>
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<tr>
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<td>outputdirectory</td>
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<td>The directory to write the generated files to. If not set, the files are written to the
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directory containing the grammar file.</td>
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<td>No</td>
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</tr>
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<tr>
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<td>buildparser</td>
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<td>Sets the BUILD_PARSER grammar option. This is a boolean option.</td>
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<td>No</td>
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</tr>
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<tr>
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<td>buildtokenmanager</td>
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<td>Sets the BUILD_TOKEN_MANAGER grammar option. This is a boolean option.</td>
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<td>No</td>
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</tr>
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<tr>
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<td>cachetokens</td>
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<td>Sets the CACHE_TOKENS grammar option. This is a boolean option.</td>
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<td>No</td>
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</tr>
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<tr>
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<td>choiceambiguitycheck</td>
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<td>Sets the CHOICE_AMBIGUITY_CHECK grammar option. This is an integer option.</td>
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<td>No</td>
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</tr>
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<tr>
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<td>commontokenaction</td>
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<td>Sets the COMMON_TOKEN_ACTION grammar option. This is a boolean option.</td>
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<td>No</td>
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</tr>
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<tr>
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<td>debuglookahead</td>
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<td>Sets the DEBUG_LOOKAHEAD grammar option. This is a boolean option.</td>
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<td>No</td>
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</tr>
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<tr>
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<td>debugparser</td>
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<td>Sets the DEBUG_PARSER grammar option. This is a boolean option.</td>
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<td>No</td>
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</tr>
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<tr>
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<td>debugtokenmanager</td>
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<td>Sets the DEBUG_TOKEN_MANAGER grammar option. This is a boolean option.</td>
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<td>No</td>
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</tr>
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<tr>
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<td>errorreporting</td>
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<td>Sets the ERROR_REPORTING grammar option. This is a boolean option.</td>
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<td>No</td>
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</tr>
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<tr>
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<td>forcelacheck</td>
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<td>Sets the FORCE_LA_CHECK grammar option. This is a boolean option.</td>
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<td>No</td>
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</tr>
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<tr>
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<td>ignorecase</td>
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<td>Sets the IGNORE_CASE grammar option. This is a boolean option.</td>
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<td>No</td>
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</tr>
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<tr>
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<td>javaunicodeescape</td>
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<td>Sets the JAVA_UNICODE_ESCAPE grammar option. This is a boolean option.</td>
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<td>No</td>
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</tr>
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<tr>
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<td>jdkversion</td>
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<td>Sets the JDK_VERSION option. This is a string option.</td>
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<td>No</td>
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</tr>
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<tr>
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<td>keeplinecolumn</td>
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<td>Sets the KEEP_LINE_COLUMN grammar option. This is a boolean option.</td>
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<td>No</td>
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</tr>
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<tr>
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<td>lookahead</td>
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<td>Sets the LOOKAHEAD grammar option. This is an integer option.</td>
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<td>No</td>
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</tr>
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<tr>
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<td>optimizetokenmanager</td>
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<td>Sets the OPTIMIZE_TOKEN_MANAGER grammar option. This is a boolean option.</td>
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<td>No</td>
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</tr>
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<tr>
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<td>otherambiguitycheck</td>
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<td>Sets the OTHER_AMBIGUITY_CHECK grammar option. This is an integer option.</td>
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<td>No</td>
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</tr>
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<tr>
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<td>sanitycheck</td>
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<td>Sets the SANITY_CHECK grammar option. This is a boolean option.</td>
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<td>No</td>
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</tr>
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<tr>
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<td>static</td>
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<td>Sets the STATIC grammar option. This is a boolean option.</td>
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<td>No</td>
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</tr>
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<tr>
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<td>unicodeinput</td>
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<td>Sets the UNICODE_INPUT grammar option. This is a boolean option.</td>
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<td>No</td>
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</tr>
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<tr>
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<td>usercharstream</td>
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<td>Sets the USER_CHAR_STREAM grammar option. This is a boolean option.</td>
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<td>No</td>
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</tr>
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<tr>
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<td>usertokenmanager</td>
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<td>Sets the USER_TOKEN_MANAGER grammar option. This is a boolean option.</td>
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<td>No</td>
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</tr>
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<tr>
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<td>maxmemory</td>
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<td>Max amount of memory to allocate to the forked JVM. <em>since Ant 1.8.3</em></td>
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<td>No</td>
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</tr>
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</table>
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<h3>Example</h3>
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<p>Invoke JavaCC on grammar file <samp>src/Parser.jj</samp>, writing the generated files
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to <samp>build/src</samp>. The grammar option STATIC is set to <q>true</q> when invoking JavaCC.</p>
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<pre>
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<javacc target="src/Parser.jj"
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outputdirectory="build/src"
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javacchome="c:/program files/JavaCC"
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static="true"/></pre>
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</body>
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</html>
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